Head of Yamaha making money - yen? (8)
I believe the answer is:
yearning
'yen?' is the definition.
(yen can mean a longing or desire)
'head of yamaha making money' is the wordplay.
'head of' suggests taking the first letters.
'making money' becomes 'earning' (I've seen this before).
The first letter of 'yamaha' is 'y'.
'y'+'earning'='YEARNING'
(Other definitions for yearning that I've seen before include "Strong desire" , "Craving" , "Longing (for something)" , "Longing, pining" , "Intense longing" .)